Thanks Ritu..
It solved my Issue..
I need one more thing..
I need to populate another field value based on the value that is selected from F4..like if we select the user id on F4 i need to display corresponding name in another field..
For this if I have written select in DO_PREPARE_DATA..? But it trigger multiple times and it will not effect performance right..
Could you please let me know how I can achieve this without effecting performance..?
Thanks,
Sara.